He says Mr Chester should also outline his policy on political donations.

"I think that again is good for democracy," he said.

"I think it's incumbent on all candidates to let the public know what they're voting for.

"It's frustrating that Darren Chester's strategy seems to be to say as little as possible and sort of get in by stealth."

Mr Chester says he has clear policies on agriculture and the environment.

He says the Nationals were the first federal party to outline their policies on coal seam gas (CSG).

"The Nationals at a federal level believed it was such a serious issue that we laid down five key principles more than two years ago now and the key to our position was that no CSG development could occur where there could be damage to a water aquifer," he said.

"We also said that no CSG development should occur on prime agricultural land and no development should occur close to residential areas."